I've found a KB streetmaxi cam for my '71 Riviera 455 and need to know what valvetrain mods I'll need to run it. street maxi three specs: lift: 510/534 dur@.050: 232/260 112 lobe center I'll be running stock exhaust manifolds, 2.5" exhaust with minimal mufflage, a 2x4 intake and this cam. Suggestions?o No:
I used dual springs , 430 rockers, good pushrods . The one I used was a bullet racing cam,, same duration and lobe sep, but mid .500 lift. You could use the thicker TA shafts, don't use the sealed power replacement shafts, they are way too thin, the stock shafts are stronger. Of course you could use roller rockers, but since the lift is not all that high, stock rockers will be fine. Jim Burek
71 Riviera... If it's not a GS, then the stock springs are rated at about 72-78# seated. That's when they're new out of the box.
Re: Re: Re: Valvetrain mods needed? I simply use hollow 455 style pushrods and oil the rockers backwards. Jim Burek